Welcome to the Silversea boards! Be sure to make your excursion reservations on MySilversea ASAP if you haven't already. Also, try to get a reservation in Silver Note, which has no extra fee but has a limited number of tables and is sometimes hard to book. If you haven't been successful so far, your butler can help you get a reservation.
The two for-fee restaurants, La Dame and Kaiseki, have their fans and non-fans. My personal advice is to spend time exploring the full menu's at the other restaurants before spending the additional $$, especially if this is only a 7 day Alaska itinerary.
When you get to your suite, your butler will introduce themselves, show you the TV and computer tablet controls (yes, there's a computer tablet where you can do everything that you can do on the interactive TV), and ask about what you want in the fridge. They will take away what you don't want and stock it with the beverages and food items you want (specific type of wine, champagne, gin and tonic and a bowl of fresh cut limes, fresh fruit, yogurt, etc.). You can also ask them for help with reservations.
On the Nova, there are complimentary cooking classes and bartending classes. The cooking ones are sign-up at reception, and you should do that the first day. I'm not sure about the bar classes, but they are held at the Salt Bar on Deck 11.
I'm sure you will have a wonderful time.